Head of a toothbrush



FIG. 1 is a perspective view of a head of a toothbrush, embodying the new design;

FIG. 2 is a top planar view of the head of a toothbrush of FIG. 1;

FIG. 3 is a left side elevational view of the head of a toothbrush of FIG. 1, the right side elevational view being a mirror image;

FIG. 4 is a bottom planar view of head of a toothbrush of FIG. 1;

FIG. 5 is a front elevational view of the head of a toothbrush of FIG. 1; and,

FIG. 6 is a rear elevational view of the head of a toothbrush of FIG. 1.

The claim ends with the surface shading immediately below the rounded edge of the face of the head. The broken lines illustrate portions of the head that form no part of the claimed design. 

The ornamental design for a head of a toothbrush, as shown and described. 